%I #9 Aug 29 2021 01:59:09

%S 68,86,168,186,268,286,368,386,468,486,568,586,668,689,768,786,869,

%T 886,968,986,1068,1086,1168,1186,1268,1286,1368,1386,1468,1486,1568,

%U 1586,1668,1689,1768,1786,1869,1886,1968,1986,2068

%N Numbers k such that 6 and 8 occur juxtaposed in the base-10 representation of k but not of k+1.

%K nonn,base

%O 1,1

%A _Clark Kimberling_